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TiO2 Nanospheres: A Facile Size‐Tunable Synthesis and Effective Light‐Harvesting Layer for Dye‐Sensitized Solar Cells |
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| Authors: | Dr. Shuan Wang Yong Ding Dr. Sichao Xu Prof. Yunxia Zhang Prof. Guanghai Li Prof. Linhua Hu Prof. Songyuan Dai |
| Affiliation: | 1. Key Laboratory of Materials Physics, Anhui Key Lab of Nanomaterials and Nanostructure, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei (P.R. China);2. University of Science and Technology of China, Hefei 230026 (P.R. China);3. Key Lab of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei (P.R. China);4. School of Renewable Energy, North China Electric Power University, Beijing (P.R. China) |
| Abstract: | A facile route to synthesize amorphous TiO2 nanospheres by a controlled oxidation and hydrolysis process without any structure‐directing agents or templates is presented. The size of the amorphous TiO2 nanospheres can be easily turned from 20 to 1500 nm by adjusting either the Ti species or ethanol content in the reaction solution. The phase structure of nanospheres can be controlled by hydrothermal treatment. The TiO2 nanospheres show excellent size‐dependent light‐scattering effects and can be structured into a light‐harvesting layer for dye‐sensitized solar cells with a quite high power conversion efficiency of 9.25 %. |
| Keywords: | energy conversion light‐harvesting layer nanostructures phase control titanium dioxide |